<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
       // 随便写代码；只要不出现语法错误即可 
       console.log(1)
    setTimeout(() => {
      console.log(2)
    }, 100)
    console.log(3)
    new Promise((resolve, reject) => {
      console.log(4)
      resolve(5)
      console.log(6)
    }).then(res => {
      console.log(res) // 5
    })
    setTimeout(() => {
      new Promise((resolve, reject) => {
        console.log(7)
        resolve(8)
      }).then(res => {
        console.log(res) // 8
      })
    }, 100)

    console.log(9)
    </script>
</body>
</html>